Several of these structures dotted the countryside of Carriacou. They are remnants of the time when sugar plantations ruled the islands and slave labor processed sugar cane. Our cab driver said that the sugar plantations started in the 17th century. Sugar cane processing and the production of sugar no longer takes place on Carriacou.
Our driver also said that they didn’t have cement to make mortar or concrete during this time so the locals used a combination of limestone and molasses. I’ll take his word for it, but I’ve never heard of that combination as a mortar to bind rocks together.